Authors :
Oke, D. A; Raheem, S. B; Jayeola, W. A; Taiwo Y; Adebiyi, A. Y
Volume/Issue :
Volume 7 - 2022, Issue 9 - September
Google Scholar :
https://bit.ly/3IIfn9N
Scribd :
https://bit.ly/3WJ56la
DOI :
https://doi.org/10.5281/zenodo.7480940
Abstract :
The sustainability of environment depends
largely on the sustainable soil ecosystem as soil is taken as
a key component of natural ecosystems. Soil
contamination has been an environmental problem that is
facing the whole regions of the world. The source of
contamination may be either natural or anthropogenic.
This research assessed the impact of oil spill on soil
in Nigeria, using NNPC Depot as a case study. Soil
samples were taken from the study area at four different
points at a depth of 0.5-1.0 m using hand-dug auger. These
samples were collected in sterilized bags and were well
labelled. The following tests were conducted on the soil
samples (contaminated and uncontaminated): Particle
size distribution test, Compaction test, Atterberg Limit
test and Permeability test.
The particle size test revealed that the variation
between the two samples (contaminated and
uncontaminated) is insignificant but the presence of oil in
the contaminated sample caused clod thereby making it
difficult to pass through some sieve sizes. The Optimum
Moisture Content (OMC) and the Maximum Dry Density
(MDD) gave 11.40%, 1.98 g/cm³ and 9.50%, 1.81g/cm³ for
both uncontaminated and contaminated samples
respectively. Likewise, The Liquid Limits (LL) and
plastic limit (Pl) gave 48 %, 33.5% and 33.6% and 14.9%
for both uncontaminated and contaminated samples
respectively. Also, the coefficient of permeability “k” gave
2.792 x 10-7
cm/s compared with the standard (soil
permeability classes for Civil Engineering) falls within the
impermeability limit (1 X 10-11
– 5 X 10-7
)
Thus the test results revealed that the contamination
of soil by crude oil in NNPC Apata influenced the
properties of the soil and subsequently leads to reduction
in the values obtained for the entire test that the soil
sample was subjected to.
Keywords :
Environmental impact assessment (EIA), soil contamination, oil spills, NNPC Deport, Particle size distribution, Optimum moisture content, Maximum dry density, plastic limit, liquid limit and permeability.
The sustainability of environment depends
largely on the sustainable soil ecosystem as soil is taken as
a key component of natural ecosystems. Soil
contamination has been an environmental problem that is
facing the whole regions of the world. The source of
contamination may be either natural or anthropogenic.
This research assessed the impact of oil spill on soil
in Nigeria, using NNPC Depot as a case study. Soil
samples were taken from the study area at four different
points at a depth of 0.5-1.0 m using hand-dug auger. These
samples were collected in sterilized bags and were well
labelled. The following tests were conducted on the soil
samples (contaminated and uncontaminated): Particle
size distribution test, Compaction test, Atterberg Limit
test and Permeability test.
The particle size test revealed that the variation
between the two samples (contaminated and
uncontaminated) is insignificant but the presence of oil in
the contaminated sample caused clod thereby making it
difficult to pass through some sieve sizes. The Optimum
Moisture Content (OMC) and the Maximum Dry Density
(MDD) gave 11.40%, 1.98 g/cm³ and 9.50%, 1.81g/cm³ for
both uncontaminated and contaminated samples
respectively. Likewise, The Liquid Limits (LL) and
plastic limit (Pl) gave 48 %, 33.5% and 33.6% and 14.9%
for both uncontaminated and contaminated samples
respectively. Also, the coefficient of permeability “k” gave
2.792 x 10-7
cm/s compared with the standard (soil
permeability classes for Civil Engineering) falls within the
impermeability limit (1 X 10-11
– 5 X 10-7
)
Thus the test results revealed that the contamination
of soil by crude oil in NNPC Apata influenced the
properties of the soil and subsequently leads to reduction
in the values obtained for the entire test that the soil
sample was subjected to.
Keywords :
Environmental impact assessment (EIA), soil contamination, oil spills, NNPC Deport, Particle size distribution, Optimum moisture content, Maximum dry density, plastic limit, liquid limit and permeability.